Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 2 O/U 8.5 | 100% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 1 O/U 8.5 | 100% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 1 Winner | 100% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 2 O/U 9.5 | 100% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez | 64% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Total Sets: O/U 2.5 | 51% |
| Completed Match | 50% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Match O/U 21.5 | 50% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set Handicap +/-1.5 | 50% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Match O/U 22.5 | 50% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Match O/U 23.5 | 50% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 2 Winner | 0% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 1 O/U 9.5 | 0% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 2 O/U 10.5 | 0% |
| ITF Sao Paulo: Isabella Barrera Aguirre vs Mell Elizabeth Reasco Gonzalez Set 1 O/U 10.5 | 0% |
Market context
Market consensus: 100% chance of itf sao paulo: isabella barrera aguirre vs mell elizabeth reasco gonzalez. Prediction markets aggregate real capital to produce this probability signal. This market refers to the tennis match between Isabella Barrera Aguirre and Mell Elizabeth Reasco Gonzalez in the ITF Women Sao Paulo, originally scheduled for July 14, 2026 at 1:3…
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
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